PCS

*šurr- - navel; navel string (SED I No. 254; Kogan 2011: 217; Kogan 2015: 198)

possible connection with verbal root *šrr - to be firm, hard

Ugaritic
šr - navel (Del Olmo Mitos 632)
Hebrew
šōr - navel (HALOT 1650)
Jewish Palestinian Aramaic
šwr - umbilical cord (DJPA 542)
Jewish Babylonian Aramaic
šūrā - umbilical cord (DJBA 1124)
Also šrrˀ, cf. DJBA 1182.
Syriac
šerrā, šurtā - umbilical cord, navel (LSyr. 802, SL 1613)
Mandaic
šura - navel (MD 456)
Arabic
surr- - navel (BK 1 1075, Lane 1338)
Arabic
surrat- - navel (Lane 1338)
Mehri
ŝīrɛ̄ - navel (ML 395)

Form ŝīrɛ̄ seems a misprint for šīrɛ̄ judging by the form šīrέh quoted in the context given in [ML 395] and the fact that the word is placed under šrˁ. 

Harsusi
šerā - navel (HL 124)
Soqotri
šíraḥ - navel (LS 421)

Note that -ˁ, absent in other Sem., may be due to contamination either with méŝeräˁ ‘tendon of Achilles’ (SSL LS 1473) or with such forms attested only in Jib.